Continuous Heterogeneous Fenton-Type Process for Dye Pollution Abatement Intensified by Hydrodynamic Cavitation

Author(s):  
Gabriel Salierno ◽  
Stefanía Napoleone ◽  
María Agustina Maisterrena ◽  
Miryan Cassanello ◽  
Maximiliano Pellasio ◽  
...  
2016 ◽  
Vol 28 ◽  
pp. 302-310 ◽  
Author(s):  
Meiqiang Cai ◽  
Jie Su ◽  
Yizu Zhu ◽  
Xiaoqing Wei ◽  
Micong Jin ◽  
...  

2020 ◽  
Vol 3 (2) ◽  
Author(s):  
HARNITA HARNITA ◽  
H. Anwar ◽  
Pendais Hak

ABSTRAK: Tujuan utama dalam penelitian ini mengetahui  latar belakang pelaksanaan kegiatan Ritual dalam Tradisi Pertanian (Galu) pada Masyarakat Desa Bone Tondo Kecamatan Bone Kabupaten Muna, mendeskripsikan ritual-ritual apa saja yang dilakukan dalam pelaksanaan kegiatan ritual dalam Tradisi Pertanian (Galu) pada Masyarakat Desa Bone Tondo Kecamatan Bone Kabupaten Muna, mendeskripsikan proses kegiatan ritual dalam Tradisi Pertanian pada Masyarakat Desa Bone Tondo Kecamatan Bone Kabupaten Muna dan mendeskripsikan perubahan yang terjadi saat ini dalam proses Ritual dalam Tradisi Pertanian (Galu) pada Masyarakat Desa Bone Tondo Kecamatan Bone Kabupaten Muna. Metode yang digunakan dalam penelitian ini adalah metode sejarah menurut Helius Sjamsuddin yang terdiri atas: (1) Heuristik (pengmpulan sumber), (2) Kritik sumber (verifikasi), (3) Historiografi (penulisan sejarah).Hasil penelitian menunjukan bahwa: (1) Latar belakang pelaksanaan ritual dalam tradisi pertanian pada masyarakat Desa Bone Tondo adalah dalam bercocok tanam (degalu) masyarakat Desa Bone Tondo memiliki keyakinan bahwa hutan di Muna banyak dihuni oleh makhluk ghaib yang berpotensi mengganggu kehidupan masyarakat. Maka secara intensif masyarakat melakukan hubungan komunikasi dengan melalui upacara yang tradisional yang dimana harus dilakukan sebelum bercocok tanam. Dengan maksud mendapatkan keselamatan dalam kegiatan perladangan terhindar dari marabahaya serta hasil panen yang melimpah. Ritual dilakukan karena adanya pantangan dan larangan yang apabila jika tidak dipatuhi akan menimbulkan dampak negatif. (2) Ritual-Ritual yang dilakukan dalam Tradisi Pertanian (Galu) pada Masyarakat Desa Bone Tondo ritual pembukaan lahan kawasan hutan baru yaitu desolo. Ritual kaago-ago yang dilakukan saat lahan sudah bersih dan siap untuk ditanamkan, ritual dilakukan untuk memindahkan makhluk ghaib, permohonan dan sebagai rasa syukur. Ritual kasambuno wite (deghoti wite) dan ritual kafematai, (3) Proses pelaksanaan Ritual dalam Tradisi Pertanian (Galu) pada Masyarakat Desa Bone Tondo yaitu semua proses ritual dilakukan pada hari baik yang dipimpin oleh dukun (parika), menyiapkan alat dan bahan (sesajian) yang dibutuhkan tiap-tiap upacara ritual yang akan dilaksanakan. (4) Perubahan yang terjadi saat ini dalam proses pelaksanaan Ritual dalam Tradisi Pertanian (Galu) pada masyarakat Desa Bone Tondo, dapat dilihat pada ritual kaago-ago, dimana saat ini sabagian ritual tersebut tidak lagi dijalankan. Perubahan-perubahan lain adalah terkait dengan konsistensi ritual yang sebagian masih ada yang melakukan secara utuh namun ada juga yang hanya menjalankan 2 atau 3 ritual saja. Kata Kunci: latarbelakang, jenis, proses dan perubahan, galu ABSTRACT: The main objective in this study is to find out the background of the implementation of Ritual activities in the Agricultural Tradition (Galu) of the Bone Tondo Village Community, Bone District of Muna District, describing the rituals performed in the implementation of ritual activities in the Agricultural Tradition (Galu) of the Village Community Bone Tondo, Bone District, Muna Regency, describes the process of ritual activities in the Agricultural Tradition of the Bone Tondo Village Community, Bone District Muna District and describes the changes that occur currently in the Ritual process in the Agricultural Tradition (Galu) of the Bone Tondo Village Community, Bone District, Muna Regency. The method used in this study is the historical method according to Helius Sjamsuddin which consists of: (1) Heuristics (collection of sources), (2) Criticism of sources (verification), (3) Historiography (history writing). The results of the study show that: (1 ) The background of ritual implementation in the agricultural tradition of the Bone Tondo Village community is in farming (degalu). Bone Tondo Village community has the belief that the forests in Muna are inhabited by unseen creatures that have the potential to disrupt people's lives. So the community intensively communicates through traditional ceremonies which must be carried out before planting. With the intention of obtaining safety in farming activities to avoid danger and abundant harvests. The ritual is carried out because of restrictions and prohibitions which if not obeyed will cause a negative impact. (2) Rituals carried out in the Agricultural Tradition (Galu) of the Bone Tondo Village Community in the ritual of opening a new forest area, namely desolo. Kaago-ago rituals are carried out when the land is clean and ready to be planted, rituals are performed to remove supernatural beings, requests and as gratitude. Kasambuno wite rituals (deghoti wite) and kafematai rituals, (3) The process of implementing Rituals in the Agricultural Tradition (Galu) of the Bone Tondo Village Community, namely all ritual processes carried out on a good day led by a shaman (parika), preparing tools and materials (offerings) ) required each ritual ceremony that will be carried out. (4) Changes that occur at this time in the process of carrying out the Ritual in the Agricultural Tradition (Galu) of the Bone Tondo Village community, can be seen in the kaago-ago ritual, where at present the ritual portion is no longer carried out. Other changes are related to the consistency of the ritual, some of which still do the whole, but there are also those who only carry out 2 or 3 rituals. Keywords: Background, type, process and change, galu


2005 ◽  
Vol 5 (6) ◽  
pp. 95-104 ◽  
Author(s):  
D.N. Barton ◽  
T. Saloranta ◽  
T.H. Bakken ◽  
A. Lyche Solheim ◽  
J. Moe ◽  
...  

The evaluation of water bodies “at risk” of not achieving the Water Framework Directive's (WFD) goal of “good status” begs the question of how big a risk is acceptable before a programme of measures should be implemented. Documentation of expert judgement and statistical uncertainty in pollution budgets and water quality modelling, combined with Monte Carlo simulation and Bayesian belief networks, make it possible to give a probabilistic interpretation of “at risk”. Combined with information on abatement costs, a cost-effective ranking of measures based on expected costs and effect can be undertaken. Combined with economic valuation of water quality, the definition of “disproportionate cost” of abatement measures compared to benefits of achieving “good status” can also be given a probabilistic interpretation. Explicit modelling of uncertainty helps visualize where research and consulting efforts are most critical for reducing uncertainty. Based on data from the Morsa catchment in South-Eastern Norway, this paper discusses the relative merits of using Bayesian belief networks when integrating biophysical modelling results in the benefit-cost analysis of derogations and cost-effectiveness ranking of abatement measures under the WFD.


1974 ◽  
Vol 9 (1) ◽  
pp. 154-171
Author(s):  
S.N. Ray ◽  
C. Hsi ◽  
B.C. -Y. Lu

Abstract This study concerns the problem of removal of suspended solids from the effluent streams of paper mills by chemical treatment. As titanium dioxide is one of the ingredients used in paper mills and present in the effluent streams, its flocculation and settling behaviour were investigated. Jar test experiments were conducted using alum and organic polyelectrolyte as the flocculants. As starch is also used in the paper making process, its influence on the flocculation and settling behaviour of titanium dioxide was conducted with the concentration of starch varying between 0–3% of the dry solids. The experimental results on flocculation are expressed in terms of dimensionless function Gθϕ and flocculation rate constants. The fraction of solids settled is presented in terms of the settling velocity. Concentration of starch was found to have a significant influence. The amount of alum required could be reduced by 75% by using starch 0.6% of the amount of titanium dioxide in the suspension and at the same time improving the settling velocity two folds. A possible application of this finding in pollution abatement is discussed.


1988 ◽  
Vol 20 (1) ◽  
pp. 37-48 ◽  
Author(s):  
L. Panneerselvam

In order to reduce the demand for the forest based raw materials by the organised industrial sectors like the large integrated pulp and paper mills, the Government of India started promoting several small-scale pulp and paper mills based on non-wood agricultural residue raw materials. However promotion of these small mills has created another environmental problem i.e. severe water pollution due to non-recovery of chemicals. Because of the typical characteristics like high silica content etc. of the black liquor produced and the subsequent high capital investment needed for a recovery system, it is not economically feasible for the small Indian mills to recover the chemicals. While the quantity of wastewater generated per tonne of paper produced by a small mill is same as from a large integrated pulp and paper mill with a chemical recovery system, their BOD load is four times higher, due to non recovery of chemicals. However the existing wastewater disposal standards are uniform for large and small mills for e.g. 30 mg BOD/l. To meet these standards, the small mills have to install a capital intensive wastewater treatment plant with heavy recurring operating costs. Therefore the feasible alternative is to implement various pollution abatement measures, with the objective of not only reducing the fibre/chemical loss but also to reduce the investment and operating costs of the final wastewater treatment system. To illustrate this approach, a case study on water pollution abatement and control in a 10 TPD mill, will be discussed.


1994 ◽  
Vol 30 (1) ◽  
pp. 13-22 ◽  
Author(s):  
G. G. O'Loughlin

The New South Wales State Government has embarked on a multi-billion dollar programme of pollution abatement in Sydney, The socio-economic and political factors which have prompted this are described, These illustrate the complexities of dealing with pollution problems while social values alter, public organisations experience administrative change and financial pressures, and politicians try to balance environmental and economic objectives, The technical progress of the Sydney initiatives to reduce storm water runoff and sewer overflow pollution is also outlined.


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